.nav-right {
  width: 57px;
  height: 231px;
  position: fixed;
  top: 200px;
  font-size: 12px;
  z-index: 200;
}
.nav-right div {
  width: 57px;
  height: 57px;
  background-color: rgba(255, 255, 255, 0.5);
  margin-bottom: 1px;
  text-align: center;
}
.nav-right div:hover {
  background-color: red;
}
